init: proyecto Flutter PluriWave — radio mundial con ecualizador

- Flutter create con org es.freetimelab
- pubspec.yaml con dependencias core (just_audio, audio_service, provider, sqflite)
- README con features y stack
- Assets preparados

android/.gitignore

@@ -0,0 +1,14 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+.cxx/
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/to/reference-keystore
+key.properties
+**/*.keystore
+**/*.jks